package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public Result<OrderSubmitVO> submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.地址不能为空，配送范围超出(暂未实现)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            return Result.error(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //2.查看当前用户下的购物车是否为空，如果为空，则返回
        Long userId = BaseContext.getCurrentId();
        List<ShoppingCart> list = shoppingCartMapper.list(userId);
        if (list == null && list.size() > 0) {
            return Result.error(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //3.插入数据到订单表中
        Orders orders = Orders.builder()
                .phone(addressBook.getPhone())
                .address(addressBook.getDetail())
                .consignee(addressBook.getConsignee())
                .number(String.valueOf(System.currentTimeMillis()))
                .userId(userId)
                .status(Orders.PENDING_PAYMENT)
                .payStatus(Orders.UN_PAID)
                .orderTime(LocalDateTime.now())
                .build();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orderMapper.insert(orders);
        //4.批量插入数据到订单明细表中
        List<OrderDetail> orderDetailList = new ArrayList<>();
        list.forEach(shoppingCart -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shoppingCart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        });
        orderDetailMapper.insert(orderDetailList);
        //5.清空购物车的数据
        shoppingCartMapper.deleteByUserId(userId);
        //6.封装返回数据
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .build();
        return Result.success(orderSubmitVO);
    }

    /**
     * 查看历史订单
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public Result<PageResult> page(int page, int pageSize, Integer status) {
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> pages = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();
        if (pages != null && pages.getTotal() > 0) {
            for (Orders orders : pages) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        PageResult pageResult = new PageResult(pages.getTotal(), list);
        return Result.success(pageResult);
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public Result<OrderVO> details(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return Result.success(orderVO);
    }

    /**
     * 用户取消订单
     *
     * @param id
     * @return
     */
    @Override
    @Transactional
    public Result cancel(Long id) throws Exception {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null) {
            return Result.success(MessageConstant.ORDER_NOT_FOUND);
        }
        if (ordersDB.getStatus() > 2) {
            return Result.error(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
        return Result.success(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     * @return
     */
    @Transactional
    @Override
    public Result repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);
        return Result.success();
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public Result<PageResult> conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        if (ordersPageQueryDTO.getPage() == null) {
            ordersPageQueryDTO.setPage(1);
        }
        if (ordersPageQueryDTO.getPageSize() == null) {
            ordersPageQueryDTO.setPageSize(5);
        }
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> orders = orderMapper.pageQuery(ordersPageQueryDTO);
        long total = orders.getTotal();
        List<Orders> ordersList = orders.getResult();
        List<OrderVO> orderVOList = new ArrayList<>();
        ordersList.forEach(orders1 -> {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders1, orderVO);
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders1.getId());
            orderVO.setOrderDetailList(orderDetailList);
            orderVOList.add(orderVO);
        });
        PageResult pageResult = new PageResult();
        pageResult.setTotal(total);
        pageResult.setRecords(orderVOList);
        return Result.success(pageResult);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public Result<OrderStatisticsVO> statistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return Result.success(orderStatisticsVO);
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     * @return
     */
    @Override
    @Transactional
    public Result confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
        return Result.success();
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     * @return
     */
    @Override
    @Transactional
    public Result rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
        return Result.success();
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     * @return
     */
    @Override
    @Transactional
    public Result cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
        return Result.success();
    }

    /**
     * 派送订单
     *
     * @param id
     * @return
     */
    @Override
    @Transactional
    public Result delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
        return Result.success();
    }

    /**
     * 完成订单
     *
     * @param id
     * @return
     */
    @Override
    public Result complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
        return Result.success();
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号：" + outTradeNo);
        String message = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(message);
    }
    /**
     * 用户催单
     *
     * @param id
     * @return
     */
    @Override
    public Result reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            return Result.error(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map = new HashMap();
        map.put("type", 2);//2代表用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        return Result.success();
    }
}
